@cyberspook Debian kFreeBSD is more like "Debian with FreeBSD kernel and base system", to be honest I'm not sure why they added GNU in the name as I don't think it has more GNU than FreeBSD proper.

And the difference between C libraries is very shallow, the only reason why musl and glibc can be seen as different is because they're so extreme in their design that some portable programs that work with all other libc can have some issues. (be it with musl or glibc)

GNU libc is quite too ressource-hungry for embeddeds, has a lot of GNU-specific extensions. And compared to all other libc it doesn't doesn't have actual support for static linking.
musl is lightweight and is quite strictly POSIX.

Much difference, wow.

> Android can't run GNU software natively anyway. It needs a compatibility layer. Like Termux.

Termux isn't a compatibility layer, it's terminal + package manager + optional chroot.
GNU utilities are running natively on android, it's not anywhere close to something like wine.